Watch tutorials and explanations by expert teachers that walk through solving this problem.
NeetCode
Greg Hogg
Ashutosh sharma
Shiva Prasad Gurram
Francesco Manicardi
Programming Live with Larry
Santamaria Code
Kim Kim Tech
Think-Twice-Code-Once
Solve more problems to master this pattern
![LeetCode [easy] Substrings of Size Three with Distinct Characters](https://i.ytimg.com/vi/MNKmCKgLqi8/hqdefault.jpg?sqp=-oaymwE9COADEI4CSFryq4qpAy8IARUAAAAAGAElAADIQj0AgKJDeAHwAQH4Af4OgAK4CIoCDAgAEAEYZSBlKGUwDw==&rs=AOn4CLD47Tbyo65nuUx8VCB0DZZhS70AWw)
